O-LevelBiologyRespiration5090/11 · Oct/Nov 2022 · Q181 Mark

Which equation represents anaerobic respiration in yeast?

Aglucose → ethanol

Bglucose → ethanol + lactic acid

Cglucose → lactic acid + carbon dioxide

Dglucose → ethanol + carbon dioxide

✓ Correct answer

D: glucose → ethanol + carbon dioxide

Oracle Prep sorts past-paper questions by topic, so you can drill Respiration and see which topics are most likely to come up next.

Topic: Respiration, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, Oct/Nov 2022 Paper 1 Variant 1, question 18.

Questions and mark schemes are from past examination papers and remain the copyright of the exam board. How Oracle Prep builds its content

In the human breathing system, which features maintain the carbon dioxide gradient between the alveoli and the outsid…

During the production of alcohol, why must air be kept out of the fermenter?

Anaerobic respiration in yeast can be summarised as follows. glucose → ethanol + carbon dioxide How many molecules of…

A plant has flowers whose anthers mature and fall off before the stigma is fully developed. What will this prevent?

Which diseases can be cured with antibiotics?

Which row correctly shows an advantage of feeding babies breast milk and an advantage of feeding them bottle milk?